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Variations in the chemical composition of illite from five geothermal fields: a possible geothermometer

Published online by Cambridge University Press:  09 July 2018

S. Battaglia*
Affiliation:
Institute of Geosciences and Earth Resources, National Research Council of Italy, Via Moruzzi n°1, 56124 Pisa, Italy
*

Abstract

Previous attempts to use illite as a geothermometer have failed: no general relation between the mineral's chemical composition and temperature of crystallization has been found. Here, chemical compositions of 27 illite samples from five different geothermal fields (the data on four of which were drawn from the literature) were compared with their crystallization temperatures. As previously reported by Cathelineau (1988), the K content was found to be the only variable yielding a suitable correlation, but only when applied to one geothermal field; when various geothermal systems were considered, the correlation weakened considerably. Introduction of a correction algorithm to the K content of the illite has made it possible to draw a single line to fit the data from all the studied samples, yielding a good correlation coefficient (r = 0.84).

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2004

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References

Battaglia, S. (1999) Applying X-ray geothermometer diffraction to a chlorite. Clays and Clay Minerals, 47, 54–63.Google Scholar
Bence, A.E. & Albee, A.L. (1968) Empirical correction factors for the electron microanalysis of silicate and oxides. Journal of Geology, 76, 382–403.Google Scholar
Bish, D.L. & Aronson, J.L. (1993) Paleogeothermal and paleohydrologic condition in silicic tuff from Yucca Mountain, Nevada. Clays and Clay Minerals, 41, 148–161.Google Scholar
Bishop, B.P. & Bird, D.K. (1987) Variation in sericite composition from fracture zones within the Coso Hot Springs geothermal system. Geochimica et Cosmochimica Acta, 51, 1245–1256.Google Scholar
Browne, P.R.L. & Ellis AJ. (1970) The Ohaaki-Broadlands hydrothermal area, New Zealand: Mineralogy and related geochemistry. American Journal of Science, 269, 97131.Google Scholar
Cathelineau, M. (1988) Cation site occupancy in chlorites and illites as a function of temperature. Clay Minerals, 23, 471–485.Google Scholar
Cathelineau, M. & Izquierdo, G. (1988) Temperaturecomposition relationships of authigenic micaceous minerals in the Los Azufres geothermal system. Contributions to Mineralogy and Petrology, 100, 418428.Google Scholar
Cathelineau, M. & Nieva, D. (1985) A chlorite solid solution geothermometer—The Los Azufres (Mexico) geothermal system. Contributions to Mineralogy and Petrology, 91, 235–244.CrossRefGoogle Scholar
De Caritat, P., Hutcheon, I. & Walshe, J.L. (1993) Chlorite geothermometry: A review. Clays and Clay Minerals, 41, 219–239.CrossRefGoogle Scholar
Dobson, P.F. & Mahood, G.A. (1985) Volcanic stratigraphy of the Los Azufres geothermal area, Mexico. Journal of Volcanic and Geothermal Research, 25, 273–287.Google Scholar
Electroconsult, ELC (1986) Exploitation of Langano-Aluto geothermal resources. Feasibility report, Milan, Italy, 87 pp.Google Scholar
Frey, M. & Robinson, D. (1999) Low-grade Metamorphism. Blackwell, Oxford, UK.Google Scholar
Gianelli, G. & Teklemariam, M. (1993) Water-rock interaction processes in the Aluto-Langano geothermal field (Ethiopia). Journal of Volcanic Geothermal Research, 56, 429–445.Google Scholar
Hedenquist, J.W. (1990) The thermal and geochemical structure of the Broadlands-Ohaaki geothermal system, New Zealand. Geothermics, 19, 151–185.Google Scholar
Hochstein, M.P., Caldwell, G. & Kifle, K. (1983) Minimum age of the Aluto geothermal system. Internal Report, Geothermal Institute, University of Auckland.Google Scholar
Hower, J., Eslinger, E.V., Hower, M.E. & Perry, E.A. (1976) Mechanism of burial metamorphism of argillaceous sediment: 1. Mineralogical and chemical evidence. Geological Society of America Bulletin, 87, 725–737.Google Scholar
Huang, W.L., Longo, J.M. & Pevear, D.R. (1993) An experimentally derived kinetic model for smectiteto-illite conversion and its use as a geothermometer. Clays and Clay Minerals, 41, 162–177.CrossRefGoogle Scholar
Jahren, J.S. & Aagaard, P. (1989) Compositional variations in diagenetic chlorites and illites, and relationships with formation-water chemistry. Clay Minerals, 24, 157–170.Google Scholar
Kazitsa, K., Kanavaki, G. & Markopoulou, T. (1993) Geothermometry of the Sperkhios River basin by vitrinite reflectance method. Bulletin of the Geological Society of Greece, 1.Google Scholar
Kisch, H.J. (1983) Mineralogy and petrology of burial diagenesis (burial metamorphism) and incipient metamorphism in clastic rocks. (Appendix B-literature published since 1976). Pp. 289-493 & 513—541 in. Diagenesis in Sediments and Sedimentary Rocks (Larsen, G. & Chilingar, G.V., editors). Developments in Sedimentology 25A, Elsevier, Amsterdam.Google Scholar
Kübler, B. (1967) La cristallinité de Pillite et les zones tout à fait supérieures du métamorphisme. Pp. 105—121 in: Etages tectoniques. Colloque de Neuchâtel, 1966. University of Neuchâtel, Switzerland.Google Scholar
Lanson, B. & Besson, G. (1992) Characterization of the end of smectite-to-illite transformation: Decomposition of X-ray patterns. Clays and Clay Minerals, 40, 40–52.CrossRefGoogle Scholar
Lloyd, E.F. (1977) Geology factors influencing geothermal exploration in Langano region, Ethiopia. New Zealand Geological Survey, Unpublished Report, UN Geothermal Project in Ethiopia.Google Scholar
Lonker, S.W. & Gerald, J.D.F. (1990) Formation of coexisting 1M and 2M polytypes in illite from an active hydrothermal system. American Mineralogist, 75, 1282–1289.Google Scholar
Mathieu, Y. & Velde, B. (1989) Identification of thermal anomalies using clay mineral composition. Clay Minerals, 24, 591–602.Google Scholar
McDowell, S.D. & Elders, W.A. (1980) Authigenic layer silicate minerals in Borehole Elmore 1, Salton Sea Geothermal Field, California, USA. Contributions to Mineralogy and Petrology, 74, 293–310.CrossRefGoogle Scholar
Mohr, P.A. (1966) The Ethiopian Rift System. Bulletin of Geophysical Observatory, Addis Ababa, 11, 1–65.Google Scholar
Nadeau, P.H. & Reynolds, R.C. Jr. (1981) Burial and contact metamorphism in the Mancos Shale. Clays and Clay Minerals, 29, 249259.Google Scholar
Pollastro, R.M. (1993) Considerations and applications of the illite/smectite geothermometer in hydrocarbon-bearing rocks of Miocene to Mississippian age. Clays and Clay Minerals, 41, 119–133.CrossRefGoogle Scholar
Perry, E.A. & Hower, J. (1970) Burial diagenesis in Gulf Coast pelitic sediments. Clays and Clay Minerals, 29, 165–177.Google Scholar
Teklemariam, M., Battaglia, S., Gianelli, G. & Ruggieri, G. (1996) Hydrothermal alteration in the Aluto Langano geothermal field, Ethiopia. Geothermics, 25, 679–702.CrossRefGoogle Scholar
Valori, A., Teklemariam, M. & Gianelli, G. (1992) Evidence of temperature increase of CO2-bearing fluids from Aluto-Langano geothermal field (Ethiopia): a fluid inclusions study of deep wells LA-3 and LA-6. European Journal of Mineralogy, 4, 907–919.Google Scholar
Velde, B. (1985) Clay Minerals - A Physico-chemical Explanation of their Occurrence. Developments in Sedimentology, 40, Elsevier, Amsterdam-Oxford-New York-Tokyo.Google Scholar
Warr, L.N. & Rice, A.H.N. (1994) Interlaboratory standardization and calibration of clay mineral crystallinity and crystal size data. Journal of Metamorphic Geology, 9, 751–764 Google Scholar